Means for lubricating hydraulic cylinders.



UNITEDA STATESv PATENT OFFICE.

LOUIS G. M. WEST, OF BALTIMORE, MARYLAND, ASSIGINOR OF ONE-HALE TO R. E, MUNRO, OF BALTIMORE, MARYLAND.

MEANS FOR LUBRICATINGEHYDRAULIC CYLINDER'S.

SEEGIIEICACLION forming part of Letters Patent No. 700,270, dated May 20, 1902.

Application filed .Iuly 30, 1901.

To all whom, t may con/cern:

Be it known that I, LOUIS G. M. WEsT, a citizen of the United States, residing at Baltimore, Maryland, have invented certain new and useful Improvements in Means for Lubrieating Hydraulic Cylinders, of which the following is a specification. A

My invention relates'to improvements in means for lubricatin g the hydraulic cylinders of elevators; and the object of the invention is to provide a simple and effective method of feeding the oil in an economical manner.

I have illustrated the invention in the accompanying drawings, iu which Figure I represents a diagrammatic view of a hydraulic cylinder, pump, and pipe connection with the oil-cup and its connections; and Fig. 2 is an enlarged detail of the oil-cup.

In the drawings, A represents the pump, which is representative of any ordinary form of pump, and B the hydraulic cylinder, which'- is likewise representative of any ordinary hydraulic cylinder, and detail illustration of these is therefore deemed unnecessary, the hydraulic cylinder being controlled in the ordinary manner well understood by -those skilled in the art.

C represents the Water-supply pi pe,extend ing from the pump to the cylinder in the ordinary manner. i

The oil-cup is designated at D and has its upper end connected with the water-supply pipe, preferably near the point Where it en ters the cylinder, bya pipe connection d. The lower end of this oil-cup is connected by a smaller Water-pipe E with the pump independently of the main Water-pipe C, so that When the pump is operating to force Water to the cylinder the pressure is likewise transmitted through the pipe E to the oil-cup,below the oil therein, so that a certain quantity of oil is fed to the main pipe C and thence into the cylinder. A cut-off Valye e is provided in the pipe E, by which the iiow of water through pipe E may be cut off when desired. A suit- Serial No. 70.257. (N o model.)

cup is of the ordinary form, having a suitable supply-pipe d', controlled by a valve, and a drain-cock d2, and also a' gage d3 for indi- -cating the height of the oil in the cup.

The operation of the invention and the causes therefor will be clearly understoodv is an appreciable loss of pressure due to fric- .tion and bends in the pipe tending to retard -the iow, and consequently there is a diiference of pressure between the inlet and outlet ofthe oil-cup, which of course disappears when the pump stops and the flow of water Having thus described my invention, what The combination with a hydraulic cylinder and the supply-pump having a pipe supply connection thereto, of an oil cup or receptacle, a pipe connection from lone end of said cup to the hydraulic cylinder, and an independent pipe connection from the other end "direct to said supply-pump, substantially as described.

In testimony whereof I affix my signature In presence of two Witnesses.

Louise. wEs'r. Witnesses: Y

yJN0. H. FILLER,

BENNETT W. WISE. 

